http://www.geocities.com/futuristgroup/vauto.html#blast

There is a pic here, it actually could open too ... Cool!

and says...

'Type 1: removable back, Takara stamping
Type 2: removable back, Hasbro/Tak stamping
Type 3: Solid back, Hasbro/Takara stamping'

so it was one of the first 2.